save register

src/ft_read.asm

@@ -15,6 +15,8 @@ section .text
     
     syscall_failed:
         
+        push rbx
+
         neg rax
         mov rbx, rax
         
@@ -22,4 +24,7 @@ section .text
 
         mov [rax], rbx
         mov rax, -1
+
+        pop rbx
+
         ret

src/ft_strcmp.asm

@@ -2,6 +2,8 @@ section .text
         global ft_strcmp
 
         ft_strcmp:
+                push rbx
+
                 xor rcx, rcx
         
         loop:
@@ -20,4 +22,7 @@ section .text
         out:
                 sub bl, dl
                 movsx rax, bl
+
+                pop rbx
+
                 ret

src/ft_strdup.asm

@@ -5,6 +5,8 @@ extern ft_strcpy
 section .text
         global ft_strdup
         ft_strdup:
+                push rbx
+
                 call ft_strlen
 
                 mov rbx, rdi
@@ -20,8 +22,13 @@ section .text
 
                 call ft_strcpy
 
+                pop rbx
+
                 ret
 
         error:
                 xor rax, rax
+
+                pop rbx
+
                 ret

src/ft_write.asm

@@ -14,10 +14,15 @@ section .text
 
         syscall_failed:
                 
+                push rbx
+
                 neg rax
                 mov rbx, rax
                 
                 call __errno_location wrt ..plt
                 mov [rax], rbx
                 mov rax, -1
+
+                pop rbx
+
                 ret

test/test.c

@@ -163,6 +163,19 @@ void multiple_test_push_front()
     } 
 }
 
+void multiple_test_strdup(const char * const *values)
+{
+    char *tmp;
+
+    for (size_t i = 0; values[i] != NULL; i++)
+    {
+        tmp = ft_strdup(values[i]);
+        test_str(tmp, values[i]);
+        free(tmp);
+        printf("\n");
+    }
+}
+
 int main()
 {
     printf("STRLEN\n");
@@ -180,8 +193,11 @@ int main()
     multiple_test_strcpy(ft_strcpy, strcpy_tests);
     printf("\n");
 
-    ft_write(1, "bozo\n", 5);
-    printf("%s\n", ft_strdup("sdsfsd"));
+    printf("STRDUP\n");
+    const char *strdup_tests[] = {"yo", "", "bonjour", "co\0fgf", NULL};
+    multiple_test_strdup(strdup_tests);
+    printf("\n");
+
 /*
     printf("ATOI_BASE\n");
     const char *atoi_base_tests[][2] = {{"0123", ""}, {"0123", "0"}, {"0123", "0123456789"}, {"bonjour", "bonjour"}, {"", ""}, {"bonjour", "salut"}, {"co\0fgf", "co\0fgf"}, NULL};